[xsl] using node fragments

[Woody <woody@xxxxxxxxxxxxxx>]

I have this section of an xml file that needs to be rendered to a table

<TGROUP>
  <COLSPEC COLNUM="1" COLNAME="1" COLWIDTH="0.713in"/>
  <COLSPEC COLNUM="2" COLNAME="2" COLWIDTH="1.179in"/>
  <COLSPEC COLNUM="3" COLNAME="3" COLWIDTH="1.272in"/>
  <COLSPEC COLNUM="4" COLNAME="4" COLWIDTH="3.283in"/>
  <THEAD>
    <ROW>
      <ENTRY COLNAME="1">Item</ENTRY>
      <ENTRY COLNAME="2">Control</ENTRY>
      <ENTRY COLNAME="3">Selection</ENTRY>
      <ENTRY COLNAME="4">Function</ENTRY>
        </ROW>
        </THEAD>
                ... lots of rows follow here

Problem here is that I need to change the COLWIDTH into percentages to 
render out to the table.

I started with:

        <xsl:variable name="sizes">
        <xsl:for-each select="ancestor::TGROUP/COLSPEC[@COLNUM]/@COLWIDTH">
          <xsl:sort select="@COLNUM" order="ascending" data-type="number"/>
          <xsl:variable name="str" select="."/>
          <xsl:choose>
            <xsl:when test="contains($str,'in')"><xsl:value-of 
select="substring($str,1,string-length($str)-2)"/></xsl:when>
            <xsl:otherwise><xsl:value-of select="$str"/></xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
       </xsl:variable>

which gets a tree fragment of the sizes which I was then intending to add 
up and convert to a percentage but hit the problem that it is a tree 
fragment which I can't do anything useful with.

As far as I can see I have the options of using javascript or node-set() to 
be able to do anything with these values, both of which are not xslt 1.0 
(which is what I was aiming for).
As I want to run this on two separate xsl processors (msxml on the PC and 
sablotron on the mac) am I stuck with having to have two separate 
stylesheets for use in this?


Woody


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